Your Cisco network currently runs OSPF and you have a need to policy-route some specific traffic,
regardless of what the routing table shows. Which one of these options would enable you to
policy-route the traffic?
A.
Source IP address and the protocol (such as SSL, HTTPS, SSH)
B.
The packet Time to Live and the source IP address
C.
Type of service header and DSCP value
D.
Destination IP address
Explanation:
Policy-based routing (PBR) provides a mechanism for expressing and implementing
forwarding/routing of data packets based on the policies defined by the network administrators. It
provides a more flexible mechanism for routing packets through routers, complementing the
existing mechanism provided by routing protocols. Routers forward packets to the destinationaddresses based on information from static routes or dynamic routing protocols such as Routing
Information Protocol (RIP), Open Shortest Path First (OSPF), or Enhanced Interior Gateway
Routing Protocol (Enhanced IGRP). Instead of routing by the destination address, policybased
routing allows network administrators to determine and implement routing policies to allow or deny
paths based on the following:
•Identity of a particular end system
•Application
•Protocol
•Size of packets